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Effects of surface chemical and electrochemical factors on the dewatering characteristics of fine particle slurry

Title
Effects of surface chemical and electrochemical factors on the dewatering characteristics of fine particle slurry
Authors
Kuh S.-E.Kim D.-S.
Ewha Authors
김동수
SCOPUS Author ID
김동수scopus
Issue Date
2004
Journal Title
Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
ISSN
1093-4529JCR Link
Citation
vol. 39, no. 8, pp. 2157 - 2182
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Coal suspension was employed in vacuum filtration process to observe the dewatering characteristics of fine particle slurry. Generally, as the size of coal particle decreased, the specific resistance was increased and dewatering efficiency was reduced. Slurries containing the particles with a broad size range had a higher compressibility and could not filter easily if modified process was not applied. This study also investigated the effects of an anionic and a cationic surfactants on filterability by examining the surface property of coal particles. Dewatering was observed to be more efficient when cationic surfactant was used. To improve dewatering rate and to reduce the final moisture content of slurry, electrodewatering combined with vacuum filtration was applied. The effects of some different variables were examined, such as the type of surfactants, electrode (arrangements and materials), and the electrical parameters (voltage and current). By application of electrodewatering, dewatering efficiency was found to be enhanced compared to conventional vacuum filtration. The specific resistance was represented to be 0.3815 at 0 V, whereas it was shown to be 0.2113 and 0.1631 at 20 V under direct current and alternative current, respectively.
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엘텍공과대학 > 환경공학전공 > Journal papers
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